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PROCESS FOR OBTAINING GRAPE TANNIN, TANNIN OBTAINED AND USES
PROCESS FOR OBTAINING GRAPE TANNIN, TANNIN OBTAINED AND USES
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机译:葡萄单宁的获得过程,葡萄单宁的获得和用途
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摘要
The invention concerns a method for obtaining grape pomace and/or seed tannin, comprising steps which consist in: (a) from fresh black or white grapes pomace and/or seed, carrying out a solid-liquid extraction of raw tannin fraction in an aqueous solvent; (b) eliminating the first solvent from the resulting extract to obtain a concentrate of the raw tannin fraction; and (c) purifying the raw tannin fraction to obtain said tannin: The method is characterised in that in step (a) sulphite water (H2O + SO2) is used as solvent, and in step (c) the raw tannin fraction is purified by selectively adsorbing the tannin polyphenol compounds on resin and by subsequent filtering. The invention also concerns the resulting tannin and its uses in particular as endogenous tannin in wine.
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机译:本发明涉及一种用于获得葡萄果渣和/或种子单宁的方法,该方法包括以下步骤:(a)从新鲜的黑色或白色葡萄果渣和/或种子中,在水溶液中进行固体单宁级分的固液萃取。溶剂; (b)从所得提取物中除去第一溶剂,以获得单宁级分的浓缩物;该方法的特征在于,在步骤(a)中使用亚硫酸水(H 2 O + SO 2)作为溶剂,并且在步骤(c)中通过以下步骤纯化该单宁馏分:将单宁多酚化合物选择性吸附在树脂上,然后进行后续过滤。本发明还涉及所得的单宁及其在葡萄酒中特别用作内源单宁的用途。
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